Loans Receivable and Allowance for Loan Losses - Loan portfolio by the past due status (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Loans Receivable and Allowance for Credit Losses
Total Loans Receivable	$ 349,764	$ 326,595
Total Past Due
Loans Receivable and Allowance for Credit Losses
Total Loans Receivable	1,237	772
30-59 Days Past Due
Loans Receivable and Allowance for Credit Losses
Total Loans Receivable	566	89
60-89 Days Past Due
Loans Receivable and Allowance for Credit Losses
Total Loans Receivable	50	655
90 or More Days Past Due
Loans Receivable and Allowance for Credit Losses
Total Loans Receivable	621	28
Loans Receivable 90 or More Days and Accruing
Loans Receivable and Allowance for Credit Losses
Recorded Investment > 90 Days and Accruing	0	0
Not past due
Loans Receivable and Allowance for Credit Losses
Total Loans Receivable	348,527	325,823
Real Estate \| One-To-Four-Family Residential
Loans Receivable and Allowance for Credit Losses
Total Loans Receivable	103,573	108,534
Real Estate \| One-To-Four-Family Residential \| Total Past Due
Loans Receivable and Allowance for Credit Losses
Total Loans Receivable	214	117
Real Estate \| One-To-Four-Family Residential \| 30-59 Days Past Due
Loans Receivable and Allowance for Credit Losses
Total Loans Receivable	190	89
Real Estate \| One-To-Four-Family Residential \| 60-89 Days Past Due
Loans Receivable and Allowance for Credit Losses
Total Loans Receivable	0	0
Real Estate \| One-To-Four-Family Residential \| 90 or More Days Past Due
Loans Receivable and Allowance for Credit Losses
Total Loans Receivable	24	28
Real Estate \| One-To-Four-Family Residential \| Loans Receivable 90 or More Days and Accruing
Loans Receivable and Allowance for Credit Losses
Recorded Investment > 90 Days and Accruing	0	0
Real Estate \| One-To-Four-Family Residential \| Not past due
Loans Receivable and Allowance for Credit Losses
Total Loans Receivable	103,359	108,417
Real Estate \| Commercial
Loans Receivable and Allowance for Credit Losses
Total Loans Receivable	205,164	184,868
Real Estate \| Commercial \| Total Past Due
Loans Receivable and Allowance for Credit Losses
Total Loans Receivable	864	655
Real Estate \| Commercial \| 30-59 Days Past Due
Loans Receivable and Allowance for Credit Losses
Total Loans Receivable	376	0
Real Estate \| Commercial \| 60-89 Days Past Due
Loans Receivable and Allowance for Credit Losses
Total Loans Receivable	0	655
Real Estate \| Commercial \| 90 or More Days Past Due
Loans Receivable and Allowance for Credit Losses
Total Loans Receivable	488	0
Real Estate \| Commercial \| Loans Receivable 90 or More Days and Accruing
Loans Receivable and Allowance for Credit Losses
Recorded Investment > 90 Days and Accruing	0	0
Real Estate \| Commercial \| Not past due
Loans Receivable and Allowance for Credit Losses
Total Loans Receivable	204,300	184,213
Real Estate \| Construction
Loans Receivable and Allowance for Credit Losses
Total Loans Receivable	10,492	10,805
Real Estate \| Construction \| Total Past Due
Loans Receivable and Allowance for Credit Losses
Total Loans Receivable	0	0
Real Estate \| Construction \| 30-59 Days Past Due
Loans Receivable and Allowance for Credit Losses
Total Loans Receivable	0	0
Real Estate \| Construction \| 60-89 Days Past Due
Loans Receivable and Allowance for Credit Losses
Total Loans Receivable	0	0
Real Estate \| Construction \| 90 or More Days Past Due
Loans Receivable and Allowance for Credit Losses
Total Loans Receivable	0	0
Real Estate \| Construction \| Loans Receivable 90 or More Days and Accruing
Loans Receivable and Allowance for Credit Losses
Recorded Investment > 90 Days and Accruing	0	0
Real Estate \| Construction \| Not past due
Loans Receivable and Allowance for Credit Losses
Total Loans Receivable	10,492	10,805
Commercial \| Commercial and Industrial
Loans Receivable and Allowance for Credit Losses
Total Loans Receivable	21,278	16,552
Commercial \| Commercial and Industrial \| Total Past Due
Loans Receivable and Allowance for Credit Losses
Total Loans Receivable	159	0
Commercial \| Commercial and Industrial \| 30-59 Days Past Due
Loans Receivable and Allowance for Credit Losses
Total Loans Receivable	0	0
Commercial \| Commercial and Industrial \| 60-89 Days Past Due
Loans Receivable and Allowance for Credit Losses
Total Loans Receivable	50	0
Commercial \| Commercial and Industrial \| 90 or More Days Past Due
Loans Receivable and Allowance for Credit Losses
Total Loans Receivable	109	0
Commercial \| Commercial and Industrial \| Loans Receivable 90 or More Days and Accruing
Loans Receivable and Allowance for Credit Losses
Recorded Investment > 90 Days and Accruing	0	0
Commercial \| Commercial and Industrial \| Not past due
Loans Receivable and Allowance for Credit Losses
Total Loans Receivable	21,119	16,552
Consumer
Loans Receivable and Allowance for Credit Losses
Total Loans Receivable	9,257	5,836
Consumer \| Total Past Due
Loans Receivable and Allowance for Credit Losses
Total Loans Receivable	0	0
Consumer \| 30-59 Days Past Due
Loans Receivable and Allowance for Credit Losses
Total Loans Receivable	0	0
Consumer \| 60-89 Days Past Due
Loans Receivable and Allowance for Credit Losses
Total Loans Receivable	0	0
Consumer \| 90 or More Days Past Due
Loans Receivable and Allowance for Credit Losses
Total Loans Receivable	0	0
Consumer \| Loans Receivable 90 or More Days and Accruing
Loans Receivable and Allowance for Credit Losses
Recorded Investment > 90 Days and Accruing	0	0
Consumer \| Not past due
Loans Receivable and Allowance for Credit Losses
Total Loans Receivable	9,257	5,836
Consumer \| Consumer and other
Loans Receivable and Allowance for Credit Losses
Total Loans Receivable	$ 9,257	$ 5,836

PB Bankshares, Inc. 10-K